采用超组元模型和LFG模型，计算了TRIP钢的碳在γ/α相界面处奥氏体侧的平衡浓度xγ/αC、先共析铁素体相变驱动力ΔGγ→α+γ1和珠光体相变驱动力ΔGγ→α+cem以及相变平衡温度Ae3和Ae1，并分析了不同热变形和化学成分的影响。计算TRIP钢未变形条件下的相变平衡温度Ae3和Ae1与试验值吻合较好，显示了本文相变热力学计算的较高精度。
By using of the super element model in association with the LFG model, the equilibrium concentration of xγ/αC, driving force for proeutectioid ferrite and pearlite transformation, ΔGγ→α+γ1 and ΔGγ→α+cem, and thermodynamic equilibrium temperature of Ae3 and Ae1 were calculated for TRIP steel, in addition, the influence on TRIP steel of different chemical composition and hot deformation conditions was discussed. The predicted and measured Ae3 and Ae1 for undeformed TRIP steel have good agreement, which shows that the calculations on phase equilibrium temperature in the paper is sufficiently accurate and reliable.
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